#define  _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int a, b;
	//Enter a and b:
	scanf("%d%d", &a, &b);
	printf("a=%d b=%d\n", a, b);
	a = a ^ b;
	b = a ^ b;
	a = a ^ b;
	printf("a=%d b=%d\n", a, b);
	return 0;
}
